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Old 09-09-10, 03:26 PM   #1
Edric
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Rockshox mag 20

bought a rockshox mag 20 on ebay. Does anyone know how to pump these things up?
Took the screw off the adjuster plate, but that's as far as I went. help anyone?
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Old 09-09-10, 03:47 PM   #2
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that is a really old fork, If i recall you use a basketball needle to inflate the fork
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Old 09-09-10, 08:25 PM   #3
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Its going on my 1989 Gt Outpost. One leg seems to be well inflated already. I know you use a ball needle to inflate it, I am just not sure where to inflate it at. I am thinking you just take the screw out of the ajsuting and place the neddle where the screw goes, but my needle doesn't fit. Its possible the needle I have is to big.
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Old 09-10-10, 05:33 AM   #4
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You remove the Philips-head screws in the center of the damping adjuster knobs and just push a standard ball inflation needle (threaded to a shock pump, of course) in there. Inflate the legs equally from 35 to 50 PSI - lower for lighter riders, higher for heavier.
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Old 09-10-10, 07:54 AM   #5
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Thank you.I have a small hand schwinn pump with a built in needle. You have just confirmed its and odd size. It doesn't fit, so I thought maybe the knob came off, but of course I couldn't budge it. Now I know I need to buy another needle.
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Old 09-10-10, 12:52 PM   #6
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Pumped it up to 40lbs with out a problem. Attached to frame. Road it in the front yard. Seems okay. I won't have a chance to ride it on Skyline drive (fire road) for a few days. I probably need to change the oil.
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Old 09-11-10, 09:32 PM   #7
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Seals leak a little oil. I picked up a seal kit on ebay, Does anyone know how to take these shocks a part with out the specialized tools?
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Old 09-12-10, 05:12 AM   #8
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Old Rockshox Manuals: http://www.retrobike.co.uk/forum/gallery2.php?g2_itemId=67375
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Old 09-12-10, 07:25 PM   #9
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thanks Cobba
Great link, but I am hoping to rebuild them with out the special rockshox tools which are imposable to find. I think I can figure it out, but was hoping someone else already had.
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Old 09-16-10, 02:13 PM   #10
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Began taking the fork apart. the main seal does leak, but i can't separate the legs, does anyone know how to pull the seal without a seal puller?
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Old 09-17-10, 04:39 PM   #11
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I tried to separate with air pressure. It didn't work. Poured one oz of clean ATF fluid in and placed the vavle cap on. tried to pump it up again. It pump up so fast that the fork separated like a cannon. need to be more careful next time. All the selas look good.
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